Mixing device for internal-combustion engines



L. 0. MILLER. MIXING nEvlcE FOR INTERNAL COMBUSTION ENGINES.

APPLICATION FILED FEB. I4. I920.

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LORIN oai'ro MILLER, or DUNKIBK, INDIANA, ASSIGNOR or TWOI-THIRDS T0MARK M. MORAN AND JAMES R. FLEMING, BOTH or PORTLAND, INDIANA.

MIXING DEVICE FOR INTERNAL-COMBUSTION ENGINES.

Specification of Letters Patent. Patented J une 29, 1920.

Application filed February 14, 1920. Serial No. 358,789.

To all whom it may concern:

Beit known that I, LORIN O. MILLER, a citizen of the United States,residing at Dunkirk, in the county of Jay and State of Indiana, haveinventedv clertain new and useful 1m orovements in Mixing Devices forInternalombustion Engines, of which the following is a specification.

This invention relates to improvements in mixing devices for internalcombustion GD lIlQS. A

in important object of the invention is to providea device adapted forinsertion intermediate the. carbureter and the intake manifold of aninternal combustion engine which will materially assist in the thoroughcommingling of thegaseous vapors from the carbureter.

V I am aware that numerous devices of this type have been constructed,but many of these devices provide for the intake of ad ditional air. Furhermore, many of these devices depend entirely upon a screen for thebreaking-up of the gaseous vapors. I have found that theuse of thescreen alone in such a device will not accomplish the desired resultwith as great efficiency as a device wherein cross arms are arranged inthe path of the vapors forwardly of the screen, these cross arms beinginclined toward the screen andmeeting at a common central point. I havefound, furthermore, that the ei'liciency of the device is increased. ifthe cross arms are perforated preventing the formation of vacuums to therearward side thereof and are tapered against the direction. of flow ofthe gases.

In the accompanying drawings wherein for the purpose of illustration isshown a preferred embodiment of my invention and wherein like numeralsdesignate like parts throughout.

Figure 1 is a perspective View of an in ternal combustion engine showingmy apparatus inserted between the carbureter and intake manifoldthereof.

Fig. 2'is a sectional view taken through the mixer and its attachedparts, taken on the line 2-=2 of Fig. 1.

' Fig. 3 is a section on the line 33 of Fig. 2.

Fig. 4 is a section on the line 4-4 of F1 2, and

Fig. 5 is a section on the line 55 of Fig. 3.

. Referring now more particularly to the drawings, the numeral 10indicates a suitable plate provided with a central circular aperture 11.The metal surrounding the aperture is provided with an annular groove 12within which is fitted a screen 13.

This screen is curved in thedirection for passage ofthe gas when theplate 10 is in its proper position, as shown in Fig. 2. A retaining ring14 is provided and inserted in the groove for the purpose of preventingaccidental removal or displacement of the screen 13.

Cross arms 15 are provided. These cross arms are arranged upon the sideof the screen 13 toward the incoming gases and are preferably four innumber and taper the small sides thereof, facing toward the incominggases. These arms are arranged in a plane at an angle to the body planeof the plate 10 and meet centrally of the aperture 11. By inspectingFig. 2, it will be seen that these arms incline in the direction ofcurvature of the screen 13., Apertures 16 are formed at each of the arms15, the apertures being enlarged at each end as at17. At the junction ofthe arms 15, an enlarged aper; ture 18 similar to the apertures 16 isprovided.

The sides of the plate 10 are provided with notches 19 adapted toreceive bolts 20 which bolts also pass throughthe flanges of the.carbureter 21 and the intake manifold 22,

gaskets being provided intermediate the cargur ter and the plate 10 andthe intake maniol I In'the operation of my device, the gases drawn fromthe carbureter by the suction of the engine are caused to circulatearound the cross arms 15 inpassing them and are thoroughly commingled.The purpose of the apertures formed in the cross arms is to allow acertain percentage of the gases to pass through said apertures to form aplurality of currents which will counteract any tendency to create avacuum and which will commingle with the gases passing along the taperedsides of the arms and thoroughly mix them. A further commingling of thegases is accomplished by the screen 13 which thoroughly scatters thegases and disperses them uniformly through the area of the intakemanifold.

I have found that the curved form of screen is the most efficient whichmay be used for the commingling of the gases. I have also found that theinclined cross arms aid materially in the commingling of the gases dueto the peculiar circulation of currents caused thereby and that theseinclined cross arms gives a much higher coefficient of efliciency thancross arms which are arranged straigl'it across or'in the plane of theplate. This is doubtless caused by the fact that when the cross bars arearranged straight across, the central portions thereof lie so far fromthe screen 13 that the proper circulation of currents is not formed. Itwill of course be understood that the screen 13 acts in a measure as abattle and causes an increased circulation of the gases intermediate thescreen and the cross arms 15. It has further been found that the crossarms when inclined and not perforated are not as eiiicient as theperforated cross arms of the same type, as the arms have a tendency tothe formation of vacuums in which the liquids of the vapor willprecipitate.

What 1 claim is:

1. A mixing device for internal combustion engines, comprising a plateadapted for insertion intermediate the carbureter and intake manifold ofthe engine, said plate being provided with a central aperture, a screenarranged within said aperture and convexed in the direction of flow,cross arms extending into said aperture intermediate said carbureter andsaid screen, said cross arms being spaced from said screen and providedwith apertures extending in the direction of flow of the gases.

2. A mixing device for internal combustion engines, comprising a plateadapted for insertion intermediate the carbureter and intake manifold ofthe engine, said plate being provided with a central aperture, a screenarranged within said aperture and convexed in the direction of flow,cross armsextending into said aperture intermediate said carbureter andsaid screen and spaced from said screen, apertures formed in said crossarms, said apertures extending in the direction of flow of the gases,said cross arms inclining toward a common center and being joinedcentrally.

3. A mixing device for internal combustion engines, comprising a plateadapted for insertion intermediate the carbureter and intake manifold ofthe engine, said plate being provided with a central aperture, a screenarranged within said aperture and convexed in the direction of flow,cross arms extending into said aperture intermediate said carbureter andsaid screen, said cross arms being inclined in the direction of flow ofthe vapor from said carbureter, meeting and being joined at a commoncenter and spaced from said screen, each of said cross arms havingapertures extending therethrough in the direction of flow of the vaporsfrom the carbureter.

4. A mixing device for internal combustion engines, comprising a plateadapted for insertion intermediate the carbureter and intake manifold ofthe engine, said plate being provided with a central aperture, a curvedscreen arranged within said aperture, and cross arms carried by saidplate, said cross arms being inclined in the direction of curvature ofsaid screen and pro vided with apertures extending therethrough in thedirection of flow of the vapors from the carbureter, the screen andcross arms being spaced from each other. 4

5. A mixing device for internal combustion engines, comprising a plateadapted for insertion intermediate the carbureter and intake manifold ofthe engine, said plate being provided with a central aperture, a curvedscreen arranged within said aperture, and cross arms carried by saidplate, said cross arms being inclined in the direction of curvature ofsaid screen and provided with apertures extending therethrough in thedirection of flow of the vapors from the carbureter, said cross arms being tapered and having the small sides thereof arranged remote from saidscreen and spaced therefrom.

In testimony whereof I aflix my signature in presence of two witnesses.

LORIN OTTU MILLER. Vitnesses:

WVAUNEITA SMITH, CHARLES D. HEMMING.

